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aivan3 [116]
2 years ago
5

PLEASE HELP

Mathematics
1 answer:
VikaD [51]2 years ago
3 0

Answer:

9

Step-by-step explanation:

total parts= 3+7=10

12=4 parts

1 part=3

3*3=9

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Solve y=-3x² + 4.5x – 20<br> Use the Quadratic formula
statuscvo [17]

Answer:

x=0.75 \pm 2.47067i

Step-by-step explanation:

Quadratic Formula: x=\frac{-b \pm \sqrt{b^2-4ac} }{2a}

√-1 is imaginary number i

Step 1: Define

y = -3x² + 4.5x - 20

a = -3

b = 4.5

c = -20

Step 2: Substitute and Evaluate

x=\frac{-4.5 \pm \sqrt{4.5^2-4(-3)(-20)} }{2(-3)}

x=\frac{-4.5 \pm \sqrt{20.25-240} }{-6}

x=\frac{-4.5 \pm \sqrt{-219.75} }{-6}

x=\frac{-4.5 \pm \sqrt{219.75}(\sqrt{-1} ) }{-6}

x=\frac{-4.5 \pm i\sqrt{219.75} }{-6}

x=\frac{4.5 \pm i14.824 }{6}

x=0.75 \pm 2.47067i

7 0
3 years ago
I am a 2nd grader i need to know 120/1234x1234x70x0x90x100x12x13x34
maxonik [38]
Anything multiplied by 0 =0
So what is left is 90x100x12x13x34 which is=47,736,000
7 0
3 years ago
Which number is a counting number? Can you do both of them plz
DochEvi [55]
Question 3 is: D. All integers are rational numbers.
Question 4 is: C. the counting number is 4. Hope this helped :)
4 0
2 years ago
If anyone could help me it would be deeply appreciated!
Hunter-Best [27]

Answer

-i sqrt 37

Step-by-step explanation:

7 0
3 years ago
PLZ HELP ME
Likurg_2 [28]

Answer:

x ≈ 14.87

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² = 10² + 11² = 100 + 121 = 221 ( take the square root of both sides )

x = \sqrt{221} ≈ 14.87 ( to the nearest hundredth )

8 0
2 years ago
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